/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.rocketmq.common;

/**
 * Topic过滤方式，默认为单TAG过滤
 */
public enum TopicFilterType {
	  /**
     * 每个消息只能有一个Tag
     */
    SINGLE_TAG,
    /**
     * 每个消息可以有多个Tag（暂时不支持，后续视情况支持）<br>
     * 为什么暂时不支持？<br>
     * 此功能可能会对用户造成困扰，且方案并不完美，所以暂不支持
     */
    MULTI_TAG

}
